Well-known tech entrepreneurs and twin brothers Ali and Hadi Partovi (pictured, left to right) are leaving MySpace, in a high-profile departure for the struggling social-networking company.

Internal memos about the executive change (which you can see below), were sent around to staff Tuesday afternoon, said sources.

"Hey everybody, it's been super tough staying quiet about (this) news at the request of our execs," said Hadi Partovi, in an internal memo obtained by BoomTown. "I know some of you are very surprised about this, and I want to apologize for not having had the option to brief you personally in advance."

Hadi was SVP of Technology at the News Corp. unit, while Ali was SVP of Business Development. Hadi will leave MySpace entirely, while Ali will have a special adviser role, said the memo from MySpace Co-President Michael Jones.

"In all likelihood, said sources, the Partovis will remain at MySpace for the next several months, although they are likely to move eventually to more senior advisory or special-project roles there in order to pursue longtime outside investing and entrepreneurial interests."

Now that has come to pass.

The fate of well-known tech wunderkinds has been one of the more interesting guessing games of late at MySpace.

MySpace managers have been keenly interested in avoiding the appearance that the company is in the grip of a talent drain, especially with such well-known innovators.

The Partovis arrived in the midst of turbulent change at MySpace last August, just after its original CEO and co-founder, Chris DeWolfe, was suddenly tossed out and replaced by CEO Owen Van Natta, as well as COO Jones and Chief Product Officer Jason Hirschhorn.

As part of its new strategy to become an entertainment hub, MySpace bought the Partovis' social music start-up, iLike, in a deal engineered by Van Natta.

After it closed, Hadi was mostly working in MySpace's Seattle office, and Ali was mostly based in San Francisco.

While several sources said the Partovis are not unhappy with the pair or with the new MySpace media-centric strategy, the brothers sold the company with the idea of working with Van Natta.

"That firing reset things," said one source close to the situation in March.

In addition, the pair have wide-ranging interests outside the company, including an active investment portfolio in such start-ups as Facebook, Dropbox, Opower, BlueKai, and Flixster.

They have also already scored big with investments in Tellme, which was sold to Microsoft; Zappos, which was acquired by Amazon; and IronPort, now owned by Cisco.

And though iLike was not the success they had hoped for, their entrepreneurial record is strong. Ali Partovi sold LinkExchange to Microsoft, and Hadi Partovi, who also worked at Microsoft, co-founded Tellme.

Now, it seems, the Partovis are onto the next challenge.

Here are the internal memos from Hadi Partovi to iLike staff and from MySpace's Jones:

Hey everybody, it's been super tough staying quiet about (this) news at the request of our execs. I know some of you are very surprised about this, and I want to apologize for not having had the option to brief you personally in advance.

I also want to call out looking backwards that we've all done a heck of a lot in just the last 6 months to help improve the MySpace business and to integrate iLike technology. Just a short list is below.

- iLike integrated MySpace Music into Google search (iLike provided the team, technology, and Google deal)
- iLike team+technology helped implement MySpace Events, launched with multi-million-dollar sponsorship commitments
- all iLike.com traffic has been merged into MySpace's overall Comscore metrics
- iLike's products have been featured in a TV ad by Apple, and will be in an upcoming TV ad by another major tech company
- iLike's promotional engine has been used multiple times in coordination with MSM to promote new albums or new artists
- MSM videos have been integrated into iLike.com and iLike on Facebook
- iLike's artist-stats are integrated into the MySpace artist dashboard
- iLike.com drives search engine traffic to MySpace artist pages
- iLike team implemented the imeem traffic redirection and data backend of imeem playlist integration
- iLike team provided backend metadata + recommendation engine for MySpace music search and song-similarities

Most importantly, thanks to our work, MySpace is the #1 provider of music on Facebook, music on Google, and Concerts on iPhone. Regardless of any challenges that MySpace needs to overcome, that is a great legacy that I know we're all proud of.

I'm personally very sad that I won't be working with any of you-the amazing team we built at iLike is perhaps our greatest accomplishment.

I'll send an email to the Seattle folks to organize a proper going-away celebration :)

Effective on Friday, MySpace SVP of Technology Hadi Partovi is leaving to pursue other opportunities. In addition to continuing his work as an advisor and angel investor to various startups, he will be following his passion for education by working directly with technology focused non-profits. Hadi leaves as a valued friend to the company, and we wish him the best of luck in his future endeavors.

Ali Partovi will be stepping down as SVP of Business Development, but will continue working with MySpace as a strategic advisor working on special projects. He will also be taking time to invest in and advise startups.

Hadi and Ali were instrumental in integrating iLike's best in class technology into the MySpace brand. Last week's successful Events launch was a direct result of that collaboration. Other noteworthy product integrations include last year's Google Music Search integration and the Local Concerts App, which is currently the most downloaded concerts app for the iPhone and was featured in one of Apple's latest iPhone TV spots.

Please join us in thanking Ali and Hadi for their contributions to MySpace.